Anyone doing DCC breast ER/PR assay, or other test?

From:

"Morken, Tim - Labvision"

Is anyone still doing any dextran coated charcol assay (DCC) for estrogen/
progesterone receptors - as a validation of IHC ER/PR?; or is there any
other similar test used to validate ER/PR IHC testing?
Tim Morken
Lab Vision / NeoMarkers
Fremont, CA, USA